A Brother and Sister Find Their Destiny

My name is David and I'm 56 years old. I have an older sister Darcy who is 59 and lives in the same town as me. I am divorced and have a townhouse while Darcy lives with her husband in the house they raised their kids in, who are now on their own. When we were kids , my sister and I would be stuck sharing everything as the youngest of 4. That meant hotel rooms on vacation, which we actually liked. We grew up together essentially and when sis went away to uni, I ended up in the same place and we bunked together. Over the years we shared houses on and off till each of us was married. That meant we had each seen each other naked on a few occasions. Going from bathroom to bedroom or behind the glass shower door. She was hot and had great tits that I often thought of as I jacked off in my room next to hers. I had also liberated many pairs of her panties that I sometimes wore and always jacked off into. I even gave my girlfriend a pair of my sisters panties. That was crazy erotic, pulling those off and fucking the pussy underneath. I started dating girls that were brunette and had a resemblance to my sister. Time went on and eventually I was divorced and single and Darcy was an empty nester in a rare if ever sex marriage. I still used her panties to jackoff into and had stolen some more pairs, a couple every time I was over so I had about 50 pairs. Then one day while surfing porn I came across incest captions. One of a girl naked except for a santa hat and the caption saying Since you've been such a good brother this year, I'll give you what you've always wanted...me! I instantly grew hard and without thinking, texted it to my sister Darcy with an lol attached. To my amazement and relief she replied That's hilarious David. I found another of a spread eagled woman passed out in a bed with the caption drunk sexy sister so I fired that one over to Darcy saying I had seen her like this a few times and that she was definitely a drunk sexy sister. I don't doubt it She replied. Each reply made me jack off and usually 5 strokes would do it. Soon enough, I was sending her regular pics, incexting as its called, and she always had positive comebacks. Finally I sent one of a brunette in lingerie saying her brother buys it for her and she models it for him. I suggested in my text that we try this and to my surprise my sister responded by asking if she got to keep it. Of course I said. I didn't hear back for a couple days so I ordered a bustier, garters stockings and microkini panties and sent her a text saying it was coming and for her to come try it on. Her reply was looks expensive. I replied saying it was worth it to see her in it. She sent back a blushing emoji. Are you around on the weekend and I said yes so Darcy said she would come by Saturday. I came in my pants to that reply and walked around at half mast for 3 days till Saturday came. Darcy arrived and she brought some wine as she was a wine rep. We drank and loosened up and then Darcy said she would try on the lingerie but may not come out. Fine I said, but I keep the lingerie. OK, I'll see how I look. A few minutes later, she emerged from my room in the lingerie. She took my breath away, and though shy and not totally comfortable, I could tell she was flattered. She had great tits and a bigger grandmas ass, but I could see her pussy trimmed behind the microkini. Awesome was all I could utter and I had an explosive hardon bursting through my jeans. I instinctively began to rub it as Darcy grew more comfortable being dressed in lingerie in front of her brother. It was a shelf bra on the bustier so I could see the top half of her dollar sized aureoles but no nipples...yet. She turned around and modelled for me and chuckled as she saw me rubbing my bulge. Let me see your tits I asked with hope in my voice. She looked at me and then slowly lowered the bustier to expose her utterly perfect tits. Still great at 59 years old. I rubbed faster and stared at her pussy. If I take off the panties David, you take off your pants. No problem I said and began to unzip as I watched Darcy pull the stings down her thighs, finally exposing her neatly trimmed honey pot framed by the black garter straps. I pulled my boxers down and my hardon sprang out. My sister stared at it as I grasped it and began to jack off while looking at my sisters tits and pussy. She watched me, smiling, proud of her power, and spread her legs wide. Can I come on you I gasped. Yes she said right away and I moved to between her legs and no sooner did I get there than I started shooting rope after rope of cum across the black bustier and my sister's and trimmed bush. She gasped each time a hot rope splashed down and , with two fingers up her pussy, she came to a shuddering climax. Her clit gets very pronounced when she's ready to go, and here it was again. I call it her power knob and she jumps and starts when I flick it with my tongue, not to mention shuddering orgasms about 45 seconds in. Now, since that day, we meet every second Saturday and have high intensity sex sessions. Our first fuck was furious and a long time coming. Not for us though, we each came about 2 minutes after I first slipped between her hot glistening pussy lips. Bondage. anal, nothing is exempt. I even take a strapon up the ass every now and then which she loves. I've cum over every square inch of my sister by now and have spent about 8000 on lingerie for her. We did try travelling as a couple a few times but we are both fairly high profile people in our town so have been recognized on occasion. Not often, but enough for us to refrain from public encounters. Of course, if Darcy has the need or I do, we make booty calls since we both love fucking each other soooo much. Her hubby is non the wiser and goes on blissfully, pounding my sister maybe twice a month. She'll sometimes try things on him that she does to me, like rim jobs or a cock ring and he says she scares him sometime. She even has to beg a little to get him to cum on her face or even to suck him dry with her pussy juice slathered all over his cock. It's absolute nirvana to me. We are great with our situation and have been banging for 4 years now. Its the highlight of our days and we feel no one can deride our affair since it is such amazing sex and her hubby is happy just to have Darcy near. If you want to seduce your sister, try the incexting route and you'll get an idea if there's any possibility of getting into your sisters pants.